Warning with PHP 8.1: Deprecated function: trim()

Problem/Motivation

When displaying content with bLazy enabled, one gets warnings on PHP 8.1

Deprecated function: trim(): Passing null to parameter #1 ($string) of type string is deprecated in Drupal\blazy\BlazyManagerBase->getIoSettings() (line 293 of modules/contrib/blazy/src/BlazyManagerBase.php).

Proposed resolution

Patch BlazyManagerBase::getIoSettings() by null-coalescing the trim() argument to an empty string:

    $thold = trim($this->configLoad('io.threshold') ?? "");

Remaining tasks

Convert to patch or merge request.

User interface changes

None.

API changes

None.

Data model changes

None.